Oven-door.



G. A. GLOVER.

OVEN noon.

- APPLICATION FILED JUNE 13, 1912. I 1 ,122,382, I Patented Dec. 29, 191i 2 SHEETS-SHEET 1.

THE NORRIS PETERS CO PHOTO L ITHOH WASHINGTON. D u

G. A. GLOVER. OVEN DOOR.

AIPLIGATION TILED JUNE 13, 1912.

1 1 22,382,, Patented Dec. 29, 1914.

2 SHEETSSHEET 2.

"HE NORRIS PETERS C0,. PHCITO-LITHQ, WASHINGrUN. D. l

sra'rns PATENT one.

OVEN-DOOR.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Application filed June 13, 1912. Serial No. 703,401.

To all whom it may concern Be it known that I, GEORGE A. GLovER, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Oven-Doors, of which the following is a specification.

My invention relates to thin metal doors for 'gas and oil-stove ovens and similar purposes and consists in a simple means for securing the glass in the door so that it may readily be replaced if broken. The essential elements are an outer frame, preferably sectional and separable from the door, and adapted to fit over the edge of the door around the opening, an inner frame preferably made in one piece and fitted to the outer frame so as to clamp the glass between the frames, and simple detachable means for connecting together the corresponding edges of the two frames on one side.

In the preferred form of my invention here shown the outer frame is composed of four thin metal sections each having an outer bead and an inner platearranged with a thin space between them to fit the edge of the door around the opening, and be per manently secured in position. One section has an inwardly and upwardly turned flange forming a groove; the opposite section has a straight flange; the ends of the sections are mitered to fit. The inner frame is stamped in one piece from thin metal and its four flat bars correspond to the flat inner plates of the outer frame. One bar of the inner frame is straight to fit the groove and the opposite bar is hooked to engage the straight flange, of the outer frame. Clips are provided to fit over and connect the hooked bar to the straight flange, so that the inner frame will be maintained securely in position after the glass has been arranged between it and the inner surface or plates of the outer frame. The side sections and side bars are preferably formed with short flanges or other engaging means to prevent lateral displacement.

My invention will be understood by reference to the drawing herewith in which the reference numerals of this description indicate the corresponding parts in all the figures.

Figure l is an inner plan of the door with the frames and glass in position with a portion broken away. Fig. 2 is a partial perspective view, and a partial vertical crosssection from the front. Fig. 3 is a perspec tive view of the bottom section of the outer frame detached. Fig. 4 is a cross-sectional view on line 41-4: of Fig. 1. Fig. 5 is a perspectlve view of a suitable form of clamp. Figs. 6 and 7 are enlarged views from the rear partly perspective and partly vertical cross-section, Fig. 6 showing the innerframe and clip in position and Fig. 7 showing the same parts separated.

In the figures 1 indicates the door stamped from sheet metal in any suitable form and design, and adapted to be hingedby hinges 8 on its bottom edge to the body of the oven.

5, 6 and 7 7 are respectively the bottom section, the top section and the two side sections of the outer frame, all the same in form to a certain extent, that is each having an outer'bead 10, an inner plate 11 and mitered ends 12 12. The side sections 7 7 are identical and are provided with short 7 with a trifling space between them, merely enough to receive snugly between them the thin edge 18 of the metal of the door surrounding the sight opening, so that when all the sections are set in place the beads form a finishing frame around the outer edge of the opening and the sections are secured firmly'and permanently in position, so that they can be displaced and removed only by a special effort. To aflord the finish these outer frame sections are preferably tinned or enameled.

The flanges on the four sections form a frame to receive the glass 20 cut to size and preferably provided near the edges and on both its inner and outer surfaces with bands of asbestos 21 glued in place, which have the triple function, mechanically to cushion the glass, so'as to lessen liability of being broken by shocks, thermally to insulate the glass to some extent from the metal so that the glass is less liable to be cracked by the heat, and also to pack the joints so that there is less heat leakage. It has been found that an bars 25 having short flanges 26 26, or

other suitable projections, to engage with the flanges 13 13 on the side sections for the purpose of inclosing the glass and preventing lateral displacement of the parts, and with a top bar 27 having a hook 28 to fit over the thin edge of the long flange 16 on the upper section. This hook is preferably a continuous hook as shown.

When the glass has been set in place with in the inwardly turned flanges on the outer frame and the inner frame set over it, as shown, clips 31 of any suitable form are applied to the engaging hook 28 and the long flange 16, whereby disengagement thereof is prevented, and therefore the glass maintained firmly in place. Any suitable form of clip may be used, preferably one that is more or less resilient, but the form here shown is simple, convenient to use and economicalto make. It is merely a short sheet metal strap, bent to shape with an upper hooked end 32 to engage with the hook, a flat back 33, and an inturned end 34 to be inserted between the plate 11 on top section 6 and the inner surface of the door. ()ne clip would generally be sufficient but two are desirable to prevent the inner frame from warping, throwing or twisting out of shape.

It will be understood that originally these ovens were provided with solid doors, but gradually glass has come to be required for convenience in examining the food being cooked and many different means have been devised for holding the glass in place, for the most part embodying bolts and nuts, but bolts and the forming of the parts for the bolts are expensive, the unscrewing and re-- assembling where a number of bolts are used, is inconvenient, particularly for one who is not a mechanic, nor an expert, the bolts often rust and the nuts set, making the operation even more convenient, and the careless manipulator often turns up the nuts too tight so that a new glass is often cracked. I not only avoid the use of unsightly bolts etc. but have devised a means for this purpose of which all parts may be economically and easily stamped or cut from sheet metal, easily assembled in the first place, and easily taken apart and reassembled by the non-expert. All he has to do is to get a glass to fit, insert a small screw driver or similar tool between the clip and the flange easily to force it out of engagement, then lift off the inner frame, set in the glass and replace the inner frame and CllPS, work.

hardly a minutes outer surface of the door, an inner portion I believe'that the form of my invention here shown is practically as simple, economical, convenient and'desirable for holding the glass as can be devised, but I do not propose to limit myself to this particular form but intend to claim my invention broadly, and

do not propose to limit myself to its use in -outer frame composed of a bottom channel member, a top and side angular members arranged to form an outer frame, and inner frame fitting within the bottom channel and secured at its top to the outer frame to clamp the glass in position and a glass fitted between the frame members.

2.-A door of the character described having an opening therein, a glass holding outer frame composed of a bottom channel member, a top member and side angular members arranged to form an outer frame,

an innerframe fitting within the bottom channel, a detachable clamping piece to secure the top-of the inner frame to the outer frame to hold the parts in position and glass fitted to the frame to be held. thereby. 3. A door of the character described having an opening therein, a glass holding outer frame composed of separate sections having abutting mitered ends and finishing beads in clamping engagement with the wall of the opening to secure the frame, one of said sections being bent to provide a channel and a straight flange on the opposite section, a glass fitted within the frame, an inner and a glass retaining flange on said inner P01431011, a sheet of glass set on said inner portions of the outer frame sections within the flanges, an integral inner frame to engage with the inner surface of the glass to a hold it in place, and detachable means to connect the inner frame to the outer frame.

5. A door of the character described having an opening therein, a glass-holding frame fitted to said opening and comprising a sectional outer frame, each section thereof fitting one edge of the opening and being formed with an outer portion to engage the to engage the inner surface of the door and a glass retaining flange on said inner portion, a sheet of glass set on said inner portions of the outer frame sections within the flanges, an integral inner frame to engage with the inner surface of the glass to hold it in place, detachable means to connect the inner frame to the outer frame, and asbestos strips arranged between the edges of the glass and the two frames.

6. In a thin metal door having a sight opening for a sheet of glass, a glass holding frame comprising a sectional outer frame and an inner frame for receiving the glass between them, and detachable means for connecting the inner frame to the outer frame, the sections of said outer frame each being formed with a bead to engage the outer surface of the door, a plate to engage the inner surface of the door, and inwardly extending glass retaining flanges on the plate, said bead and plate being spaced tightly to receive between them the edge of the metal door adjacent the opening.

7. In a thin metal door having a rectangular sight opening to be covered by a sheet of glass, a glass holding frame comprising a four part, sectional, outer frame and a one piece, four sided inner frame having a rectangular opening not substantially smaller than said sight opening and detachable means to secure the inner frame to the outer frame when the glass is in place between them, said outer frame sections each being formed with a narrow outer projection to engage the outer surface of the door, a wider, inner projection to engage the inner surface of the door and receive the glass, an inner glass retaining flange on the outer edge of the inner projection and mitered ends to fit the adjacent sections and the inner frame being formed to fit the outer frame and engage with the flanges thereon.

8. A door of the character described having an opening therein, a glass holding outer frame composed of separate sections, having abutting mitered ends and finishing beads in clamping engagement with the wall of the opening to secure the frame in position, one of said sections being bent to provide a channel and the opposite section having a straight flange, a glass fitted within the frame, an integral inner frame having one edge fitting within the channel and a flange on the opposite edge to engage with the straight flange, opposite to the channel on the outer frame, and a clamping piece to engage said opposite flange on the outer frame to secure the inner frame in position.

9. A door of the character described having a square opening therein, a glass holding outer frame composed of four separate sections having abutting mitered ends and finishing beads in clamping engagement with the wall of the opening to secure the frame in position, the lower one of said sections being bent to provide a channel, the opposite section having a longer straight flange and the two side sections having shorter straight flanges, a glass fitted within the frame on the inner surface of the door, an integral four sided inner frame having its lower edge fitting the channel, a flange on its upper opposite edge engaging said longer straight flange and short flanges on its side edges to engage over and outside of the short straight flanges onthe outer frame, and a clamping piece to engage with said two opposite flanges to secure the inner frame to the outer frame, substantially as described and shown.

10. A thin metal door having a glass covered sight opening comprising flanges inwardly extending from the door around and a short distance from the opening, leav ing a flat surface between the flanges and the opening, the flange at the bottom of the door being upwardly turned forming a channel, the glass arranged within said flanges and having its lower edge set in the channel, a one piece frame having its lower edge set in the channel and fitting within the flanges to engage with the inner surface of the glass, said frame having on one edge a frame flange extending adjacent to one of the door flanges, a detachable clamp to engage with said frame flange and adjacent door flange, and having a part thereof inserted between the door and the door flange frictionally to hold it in position.

11. A .thin metal door having a rectangular sight opening and means for securing a glass in said opening, comprising a self securing outer frame composed of sections for the respective edges of the opening, each section having an outer portion and an inner portion arranged adjacent to grip the edge of the opening between them and an inwardly extending flange arranged at a short distance from the edge of the opening, a glass set within the flanges, a one-piece inner frame set over the glass within the flanges and having on at least one side an inwardly extending flange extending adjacent to one of said outer frame flanges, and a detachable clamp engaging with said outer frame flange and inner frame flange to hold the inner frame in position.

In'testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE A. GLOVER.

WVitnesses BETSEY D. BLANOHARD, EDNA M. GLovER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

